TECHLINE HCVXR AND CV DESIGN GUIDE DRIPLINE FOR SUBSURFACE AND ON-SURFACE

Transcription

1 TECHLINE HCVXR AND CV DESIGN GUIDE DRIPLINE FOR SUBSURFACE AND ON-SURFACE

2 TABLE OF CONTENTS INTRODUCTION Overview...3 DESIGN CRITERIA Site Survey...4 Point of Connection...4 BASIC DESIGN STEPS When Should You Use Techline HCVXR or CV...5 Choosing the Proper Techline HCVXR or CV...5 General Guidelines Charts...6 Types of Layouts...7 What Do These Layouts Have in Common?...7 GRID Layout...7 LITE Layout...8 Calculating Equal Row Spacing...8 Length of Techline Rows...9 Maximum Length of Laterals Charts...9 Center Feed GRID Layout...10 Other GRID Layout Considerations...10 Creating Sub-Headers to Reduce Glue/Saddle Joints...11 Zone Water Requirements...11 Flow Per 100' Charts...11 Calculating Total Zone Water Demand... Fittings...13 Staples... Line Flushing Valves... If An Automatic Flush Valve is Not Desired... If An Air/Vacuum Relief Vent is Desired...15 Filters... Disc Filter Sizing Charts... Pressure Regulating Valves (PRV)...17 Pressure Regulator Sizing Charts... Low Volume Control Zone Kits - Disc...19 Low Volume Control Zone Kits - Screen... Slopes and Berms...21 In-Line Check Valve...21 Trees... Pressure and Flow Checks... Calculating Precipitation Rates... 1

3 TABLE OF CONTENTS (CONTINUED) TECHLINE HCVXR AND CV IN TURF Turfgrass...23 Where and Why to Use Techline in Turf...23 Tips for Using Techline in a Newly-Sodded Lawn... SPECIAL APPLICATIONS AND TIPS Parking Lot Islands...25 Electrical Grounding...25 Above and Below Grade...25 WINTERIZING INSTRUCTIONS Winterizing Instructions...26 Manual Winterization...26 Compressed Air Winterization...26 TECHNICAL DATA Techline HCVXR Dripline...27 Techline CV Dripline...28 Techline CV and Techline HCVXR Emitters...29 Design Formulas...30 Specifying Model Numbers...32 Techline HCVXR Application Rate Tables...33 Techline CV Application Rate Tables...34 End Feed Layout...35 Slope Layout...36 Block System on Slope Layout...37 Center Feed Layout...38 Installation Checklist...39 System Inspection Checklist...40 Friction Charts

4 INTRODUCTION This manual covers the basics of design, installation, and maintenance of Techline HCVXR and CV integral driplines. Included are design steps, technical data, design layouts, as well as some design and installation details and checklists using both the GRID and LITE layout methods. OVERVIEW: Netafim is the world leader in low volume irrigation. Since the early 1960 s Netafim has pioneered the science of subsurface, on-surface and point source irrigation and manufacturing. Serving more than 110 countries worldwide, Netafim products are sold in the Landscape & Turf market, as well as agriculture, greenhouse and nursery, wastewater and mining. The Techline HCVXR and CV family of products have been used successfully in landscape since 1987 in North America. Techline HCVXR and CV allow for even more water conserving designs because check valves are built into every emitter. Landscape architects, contractors, designers and consultants recognize the benefits of using low volume and drip irrigation for new plantings because of its accelerated plant growth compared to overhead spray and rotor irrigation. Coupling the rapid growth with dramatic water savings and low volume irrigation becomes an important part of any irrigation system. With the flexibility and quality of Netafim products, architects, designers, and contractors have highly sophisticated solutions to client and installation issues by bringing drip and subsurface components together to grow plants, trees, shrubs, groundcover, and yes, even turf. 3

5 DESIGN CRITERIA Designing with Techline HCVXR and CV follows the same basic rules as designing with Techline DL, sprays and rotors. Point of connection, static and operating pressures, flow rates, and type of materials being irrigated are the same. Designing similar areas into a zone and not mixing products with different application rates is just like sprinkler design. The essential differences include knowing the type of soil you are working with, and the method of layout you use in the design. SITE SURVEY: Obtain or draw a scaled plan of the site to be irrigated. Identify all slopes on the plan. Identify the type of soil (sand, loam, clay or coarse soil). Determine types of materials to be irrigated, turf, groundcover, shrubs, plants, and trees. POINT OF CONNECTION: Type of water, potable, well, pump, effluent, etc. Pressure and volume available - static and operating tests. Note: For Techline HCVXR and CV Technical Product Application and Specifications, see page 27 and 28. 4

6 BASIC DESIGN STEPS WHEN SHOULD YOU USE TECHLINE HCVXR OR CV? Anytime you want to create an even wetted pattern of water throughout an area. Since the object of sprinklers is also to create an even wetted pattern, you can use Techline HCVXR and CV anytime you can use sprinklers. CHOOSING THE PROPER TECHLINE HCVXR OR CV: From Table 1: General Guidelines (page 6), answer two questions: 1. Are you irrigating a Shrub and Groundcover area or Turf? 2. Is the soil Clay, Loam, Sandy or Coarse Soil? Follow the proper column listed under Turf or Shrub & Groundcover to identify the proper Techline. Example - If you choose Shrub and Groundcover, with loam soil, 0.4 GPH/ Techline CV is the proper choice. (Each emitter will deliver 0.4 GPH and the emitters, mounted inside the tubing, are spaced apart.) What other information is in the General Guidelines table? 1. How far to spread out the laterals is listed on the Lateral (Row) Spacings line. (For this example, rows should be evenly spaced anywhere from - apart.) 2. The corresponding application rates and time to apply are listed after the Lateral Spacings line. (With rows of 0.4 GPH/ Techline CV every apart, the application rate is 0.30 inches per hour and it will take 50 minutes to apply 1/4 of water. If the rows are apart, the application rate is 0.23 inches per hour, and it will take 66 minutes to apply 1/4 of water. For other row spacings see Application Rates Tables, pages 33 and 34. 5

7 BASIC DESIGN STEPS (CONTINUED) TABLE 1: GENERAL GUIDELINES TECHLINE HCVXR EMITTER FLOW 0.33 GPH GPH 0.77 GPH 1. GPH 0.33 GPH GPH 0.77 GPH 1. GPH EMITTER SPACING LATERAL (ROW) SPACING BURIAL DEPTH APPLICATION RATE (INCHES/HOUR) TIME TO APPLY ¼ OF WATER (MINUTES) TURF SHRUB & GROUNDCOVER CLAY SOIL LOAM SOIL SANDY SOIL COARSE SOIL CLAY SOIL LOAM SOIL SANDY SOIL COARSE SOIL Bury evenly throughout the zone from 4 to 6 Following these maximum spacing guidelines, emitter flow selection can be increased if desired by the designer. 1. GPH flow rate available for areas requiring higher infiltration rates, such as coarse sandy soils. On-surface or bury evenly throughout the zone to a maximum of TECHLINE CV EMITTER FLOW 0.26 GPH 0.4 GPH 0.6 GPH 0.9 GPH 0.26 GPH 0.4 GPH 0.6 GPH 0.9 GPH EMITTER SPACING LATERAL (ROW) SPACING BURIAL DEPTH APPLICATION RATE (INCHES/HOUR) TIME TO APPLY ¼ OF WATER (MINUTES) TURF SHRUB & GROUNDCOVER CLAY SOIL LOAM SOIL SANDY SOIL COARSE SOIL CLAY SOIL LOAM SOIL SANDY SOIL COARSE SOIL Bury evenly throughout the zone from 4 to 6 Following these maximum spacing guidelines, emitter flow selection can be increased if desired by the designer. 0.9 GPH flow rate available for areas requiring higher infiltration rates, such as coarse sandy soils. Note: 0.4, 0.6 and 0.9 GPH are nominal flow rates. Actual flow rates used in the calculations are 0.42, 0.61 and 0.92 GPH. On-surface or bury evenly throughout the zone to a maximum of

8 BASIC DESIGN STEPS (CONTINUED) TYPES OF LAYOUTS: There are two layout methods we recommend - GRID and LITE. Both accomplish the same goal, but one method will be the preferred method based on what and how you are irrigating. WHAT DO THESE LAYOUTS HAVE IN COMMON? Both methods assume even row spacings will be maintained Both methods are designed to flow water in a loop manner GRID: This is the preferred method for installing Techline HCVXR and CV subsurface This method uses supply and exhaust headers with rows of Techline connected at each end The supply header delivers water to each row of Techline The exhaust header forms a continuous loop, or return leg, so all rows of Techline are being supplied from both ends This interconnection of the piping network is the GRID layout. This evens out the flow, helps ensure water is being delivered downstream of any break in the laterals, and allows for much easier repairs of any line breaks. Basic GRID Layout Supply Header Exhaust Header Netafim LVCZ Kit contains Pre-Assembled Valve, Filter and Pressure Regulator TECHLINE MFV Manual Flush Valve Plumbed to PVC or Poly BASIC GRID LAYOUT: Headers should be indented 2-4 from hardscapes and planting areas. Headers may be PVC, polyethylene or in zones under 5 GPM, Techline HCVXR and CV or Techline Blank Tubing. Headers must be sized to accommodate the flow of the zone without exceeding 5 feet per second velocity. (Zone Water Requirement calculations are on pages 11 and.) Start rows of Techline 2-4 away from the edge of hardscapes, and move across the area with equal row spacing that does not exceed the recommendations of Table 1: General Guidelines (see page 6). (The 2 setback will help provide enough moisture to prevent heat damage to plant material generated by hardscapes such as asphalt). Start rows about 4 away from planting beds. 7

9 BASIC DESIGN STEPS (CONTINUED) LITE: The LITE layout is used exclusively on-surface It is the fastest and easiest layout method because no supply and exhaust headers are used The dripline simply weaves back and forth throughout the zone in evenly spaced rows Basic LITE Layout BASIC LITE LAYOUT: Water being supplied to the zone is split with a Techline 17mm fitting into two directions. Use a Techline Combination Tee fitting (TL075FTEE) or 3/4" MPT x "V" fitting (TL2W075MA). Weave the Techline back and forth throughout the planting area with evenly spaced rows. Indent the tubing 2-4 from hardscapes and planting areas. Because water is being split into two separate paths that meet in the middle, the maximum length of the lateral can be twice the stated limit in Table 2: Maximum Length of a Single Lateral (see page 9). Therefore, to determine the maximum amount of Techline you can use in the zone, simply double the maximum length stated in Table 2: Maximum Length of a Single Lateral (see page 9). Example: 5' x " = 60" 60" - 8" (2 edges x 4 setback) = 52 Following recommended Techline HCVXR and CV Row Spacing for this example, assume " from Table 1 Calculating Equal Row Spacing 52 = 2.89 spaces between Techline rows Round up 2.89 to the next whole number, which is 3 (spaces) Add 1 (one) to the number of spaces to determine the number of Techline rows 5' 52" Determine equal spacing between Techline rows: 52" 3 = 17.3" TECHLINE 2" to 4" Setback from Edge NOTE HOW TO QUICKLY DETERMINE THE AMOUNT OF TECHLINE IN A ZONE (Square Footage of Zone x ) Minimum Recommended Row Spacing 8

10 BASIC DESIGN STEPS (CONTINUED) LENGTH OF TECHLINE ROWS: As with overhead irrigation, friction losses through pipe determine how long a length of pipe can be. You do not need to go through friction loss calculations for Techline HCVXR and CV laterals. It has already been done for you. Table 2 shows the maximum length of a single Techline lateral within a zone. The table also determines what the operating pressure of the zone needs to be. Example: If you have a 295 lateral of 0.6 GPH/ Techline CV, it will need 35 psi to operate properly. If it is from , it will need 45 psi. Note: We will discuss how to regulate your pressure in the Pressure Regulating Valve section (see page 17). Once the zone is laid out, note the pressure you will need somewhere on the design. You will need this information later to size the Pressure Regulating Valve. TABLE 2: MAXIMUM LENGTH OF A SINGLE LATERAL (FEET) TECHLINE HCVXR EMITTER SPACING EMITTER FLOW (GPH) INLET PRESSURE 25 psi 30 psi 35 psi 40 psi 45 psi 50 psi 55 psi 60 psi TECHLINE CV EMITTER SPACING EMITTER FLOW (GPH) INLET PRESSURE psi 25 psi 35 psi 45 psi 55 psi 60 psi

11 BASIC DESIGN STEPS (CONTINUED) CENTER FEED GRID LAYOUT: You can increase the length of laterals by center-feeding the zone. By doing so, you can have a length of Techline as called out in Table 2: Maximum Length of a Single Lateral, going in each direction, effectively doubling the maximum lateral length. This is just like we discussed with the LITE layout (see page 8). Where layout flexibility exists, Center Feed layout is an excellent design method. MF Center Feed Layout Manual Flush Valve Plumbed to PVC or Poly Techline 17mm Start Connection Male Adapter PVC or Poly Exhaust Header PVC or Poly Supply Header Techline 17mm Start Connection Valve with Disc Filter and PRV Area Perimeter It allows for the most even flow of water through the zone. Techline Tubing Lateral It is an excellent option for median strips and other large, homogenous areas. MF Perimeter Laterals 2" to 4" From Edge OTHER GRID LAYOUT CONSIDERATIONS: When branching out or joining rows of Techline HCVXR or CV, one of two rules apply: Rule #1: When branching out Techline from the supply header, add up all branched out dripline and check it against the maximum lateral length listed in Table 2: Maximum Length of a Single Lateral. Rule #2: When joining laterals from the supply header, check only the longest lateral against the maximum allowable in Table 2: Maximum Length of a Single Lateral. Branching Out Laterals Joining Laterals Netafim LVCZ Kit contains Pre-Assembled Valve, Disc Filter and PRV Supply Header Netafim LVCZ Kit contains Pre-Assembled Valve, Disc Filter and PRV Supply Header Total the combined length of these Techline laterals and compare it against the maximum lateral length allowed in Table 2. Check longest lateral against Table 2 for maximum lateral length. Exhaust Header MFV Manual Flush Valve Plumbed to PVC or Poly Exhaust Header MFV Manual Flush Valve Plumbed to PVC or Poly 10

12 BASIC DESIGN STEPS (CONTINUED) CREATING SUB-HEADERS TO REDUCE GLUE/SADDLE JOINTS To reduce the number of glue joints, saddles or insert fittings in a header, transition to Techline HCVXR and CV and Techline fittings to make up subheaders. Make sure to follow the guideline of not exceeding 5 GPM in the 'sub-header' zone. PVC or Poly Piping Techline fittings and dripline ZONE WATER REQUIREMENTS: Once the Techline is laid out, we need to identify total zone flow. This will help determine mainline and submain as well as supply and exhaust header sizing, valve, filter, and pressure regulator selection. Because Techline HCVXR and CV are pressure compensating, the flow rate per 100' is the same over a wide pressure range. There are two ways to determine the flow in a Techline zone using the calculation chart on page or Table 3: Flow per 100 Feet below. Table 3: Flow per 100 Feet, shows an easy way to determine total zone flow: Add up the amount of Techline (in hundreds of feet) and Multiply that figure by the corresponding dripline GPM to determine zone flow. TABLE 3: FLOW PER 100 FEET TECHLINE HCVXR EMITTER 0.33 EMITTER EMITTER 0.77 EMITTER 1. EMITTER SPACING GPH GPM GPH GPM GPH GPM GPH GPM TECHLINE CV EMITTER 0.26 EMITTER 0.4 EMITTER 0.6 EMITTER 0.9 EMITTER SPACING GPH GPM GPH GPM GPH GPM GPH GPM

13 BASIC DESIGN STEPS (CONTINUED) Calculating Total Zone Water Demand Multiply Total Feet x = Total inches of Techline Total Inches of Techline Emitter Spacing = Number of Emitters Multiply Number of Emitters x Emitter Flow Rate (GPH) = Total GPH Flow Total GPH Flow 60 = Total GPM in the Zone Example: Ten 100 rows of Techline with Emitter Spacing of, Flow Rate is 0.6 GPH. 100 x 10 = 1,000 1,000 x =,000,000 = 667 Emitters 667 Emitters x 0.61* GPH = 407 GPH Total Flow 407 GPH 60 = 6.78 GPM Flow in the Zone *0.61 is the actual flow rate of the 0.6 GPH emitter and should be used in calculations for greatest accuracy.

14 BASIC DESIGN STEPS (CONTINUED) FITTINGS: When laying out Techline HCVXR or CV, you will need to use fittings. If you have chosen a GRID layout, you may need a transition fitting from the supply piping to the Techline laterals. Further, you will use Techline 17mm fittings to connect the rows of Techline to the headers. If you are using a LITE layout, you will also use a transition fitting from the supply piping, as well as a fitting at the end or midpoint of the zone so that a flush point can be installed. Netafim 17mm barbed insert fittings are designed to speed the installation as well as offer you a broad range of choices. The barbed end(s) of all Techline fittings is raised and sharp. This allows the fitting to be used with operating pressures up to 58 psi. Fittings are simply pressed into the tubing. No special tools are required. As with all polyethylene pipe, do not heat the tubing before inserting the fittings. It is not necessary and it can damage the pipe. 3/4" Male Adapter TL075MA 1/2" Male Adapter TL050MA Insert Adapter for 1" or Larger PE TLIAPE Insert Adapter for 1 1/2" or Larger PVC TLIAPVC Insert Coupling TLCOUP Insert Elbow TLELL Insert Tee TLTEE Insert Cross TLCROS Combination Tee Ins. x Ins. x 3/4" FPT TL075FTEE 3/4" MPT x 'V' TL2W075MA Figure 8 Line End TLFIG8 13

15 BASIC DESIGN STEPS (CONTINUED) STAPLES: Techline staples (TLS6) are used to hold dripline in place. While most commonly used when Techline is laid on-surface or under a mulch cover, staples are also valuable when a layout is being assembled sub-grade before being covered with dirt. Rule of Thumb: Use a minimum of one staple for every: 3 feet of dripline in sand 4 feet of dripline in loam 5 feet of dripline in clay Further, use 2 staples 'x ed' over each other with any change-of-direction fittings such as tees, elbows or crosses. Use a rounded staple so as not to pinch tubing during installation. 6" Soil Staple TLS6 LINE FLUSHING VALVES: Techline HCVXR and CV has a check valve in each emitter designed to hold back a 8.5' or 4.6' column of water (3.64 psi and 2 psi emitter closing pressure). Therefore, it may not be desirable to use an automatic flush valve with Techline HCVXR and CV, since it could allow water to drain from the dripline after zone shutdown. Line flushing valves are used to provide a cleansing action in dripline each time the zone is turned on. When the zone is turned on, the flush valve begins dumping water into a sump located under it. The dumping of water (additional flow) allows the velocity of water inside the dripline to increase momentarily helping to clean the inside walls of the tubing. This action moves sediments out of the zone and into the sump. IF AN AUTOMATIC FLUSH VALVE IS NOT DESIRED: It is because holding the water in the Techline is desired and, Procedures have been established to manually flush the lines during the season. In this case, Manual Flush Valves (TLSOV) or Figure 8 Line Ends (TLFIG8) should be located along the exhaust header, or at the midpoint of a LITE layout. Manual Flush Valve (TLSOV) (blank tubing may be attached to outlet) 3/4" Gravel Sump (1 Cubic Foot) Manual Flush Valve TLSOV Techline Lateral (or Exhaust Header) Valve Box (Install Per Specs) Brick Supports (Three)

16 BASIC DESIGN STEPS (CONTINUED) NOTE NOTE IF AN AIR/VACUUM RELIEF VENT IS DESIRED: Because Techline HCVXR and CV is designed to keep water in the tubing, an air/vacuum relief vent (TLAVRV) would only be used in conjunction with an Automatic Flush Valve as described in the previous section. If you want to hold the water inside the dripline after zone shutdown, (you are using a TLSOV or TLFIG8 in lieu of an Automatic Flush Valve) DISREGARD THIS SECTION. An air/vacuum relief vent (TLAVRV) freely allows air into a zone after shutdown. It also ensures a vacuum doesn t draw debris into the dripline. Further, they also provide a means of releasing air from the dripline when the zone is turned on, thus eliminating air pockets and speeding up dripline operation. (Because water stays in a Techline HCVXR and CV zone anytime the elevation across the zone is less than 8.5' and 4.6', this is not an issue). On zones where an air/vacuum relief vent is desired, they are installed at the highest point(s) in the zone. To ensure that all of the rows of the dripline can take advantage of the air/vacuum relief vent, install it/them along a lateral that runs perpendicular to the dripline laterals. This may be an exhaust header, or a special lateral connecting all the rows of dripline, such as going over a berm. In large scale irrigation systems where pumps and large diameter pipe are used, air that has been created must be expelled. As such, the use of continuous air vents may be required on continuously and non-continuously pressurized lines. 6" Round Valve Box Air/Vacuum Relief Vent Combination Tee - (TL075FTEE) Brick Supports (3) Air/Vacuum Relief Vent - 1/2" MPT TLAVRV Installing Air/Vacuum Relief Valve to Laterals Techline 17mm Start Connection Exhaust Header Techline 17mm Tee Air/Vacuum Relief Vent (Plumbed to Techline, one at each high point) MFV AR Finish Grade 3/4"M x 1/2"F Reduction Bushing 3/4" Crushed Gravel Sump Techline Tubing Manual Flush Valve Plumbed to PVC, Poly or Techline Area Perimeter Techline Lateral Tubing Blank Tubing Centered on Mound or Berm Supply Header LVCZ Kit contains Pre-Assembled Valve, Filter and PRV 15

17 BASIC DESIGN STEPS (CONTINUED) FILTERS: Just like overhead irrigation, dripline needs protection against dirt and debris. (In sprinkler heads, filters are placed under the drive assembly or nozzle). With dripline, one filter is placed at the beginning of the zone, or at the point of connection (POC). Filters are normally installed immediately downstream of the remote control valve. Netafim disc filters use an overlapping series of grooved discs that force water to move through a series of trap points. The depth created by stacked discs captures more debris than screen filters. The disc filter elements are easily removed from the filter body and flushed clean under a faucet or in a pail of clean water. Rule of Thumb: Techline HCVXR and CV only require 0 mesh filtration. Finer mesh is not necessary and may require more frequent cleaning. Refer to Table 4, Disc Filter Sizing Chart below to properly size the filter. TABLE 4: DISC FILTER SIZING CHARTS TECHLINE HCVXR DRIPPER FLOW RATE Minimum 1.00 GPM 3/4 Maximum.00 GPM Minimum 5.00 GPM 1 Maximum GPM Minimum GPM 1 or 1 1/2 Long Maximum GPM Minimum GPM 2 Maximum GPM DRIPPER SPACING DRIPPER SPACING DRIPPER SPACING ,2 1, ,273 2,046 1, ,364 2,728 1,881 1, , ,819 1, ,728 2,955 2,038 1,343 7,091 4,432 3,057 2,015 9,455 5,910 4,076 2,686 1,819 1, ,728 1,705 1, ,637 2,273 1,568 1,034 6,364 3,978 2,743 1,808 9,546 5,966 4,115 2,7,728 7,955 5,486 3,6 7,273 4,546 3,135 2,067 10,910 6,819 4,703 3,100,546 9,091 6,270 4,133,000,500 8,621 5,682 30,000,750,932 8,523 40,000 25,000 17,2 11,364 TECHLINE CV 3/4 1 1 or 1 1/2 Long 2 DRIPPER FLOW RATE Minimum 1.00 GPM Maximum.00 GPM Minimum 5.00 GPM Maximum GPM Minimum GPM Maximum GPM Minimum GPM Maximum GPM DRIPPER SPACING DRIPPER SPACING DRIPPER SPACING ,728 1,703 1, ,091 2,554 1,777 1,9 5,455 3,405 2,369 1,558 1, ,705 1, ,273 1, ,910 3,688 2,566 1,688 8,864 5,532 3,849 2,531 11,819 7,376 5,132 3,375 2,273 1, ,410 2,8 1, ,546 2,837 1,974 1,298 7,955 4,965 3,454 2,272 11,932 7,447 5,1 3,407 15,910 9,930 6,908 4,543 9,091 5,674 3,948 2,596 13,637 8,511 5,9 3,894,2 11,348 7,895 5,192 25,000 15,603 10,856 7,139 37,500 23,405,283 10,708 50,000 31,6 21,711,277

18 BASIC DESIGN STEPS (CONTINUED) PRESSURE REGULATING VALVES (PRV): Pressure regulating valves reduce the operating pressure so that Techline zones operate between to 58 psi for Techline CV and 21.8 to 58 psi for Techline HCVXR. PRVs are normally installed immediately downstream of the disc filter and control valve. Often all three components are in the same valve box, and the distance from the PRV to the Techline is limited so additional friction is not incurred. The two most popular sizes of PRV are both 3/4" units. One is a low flow version that has a flow range of GPM. The high flow version has a flow range of GPM. Other sizes from 1 1/2" - 3 are also available for zones with flows up to 0 GPM. SELECTING THE CORRECT PRV To select the correct PRV, choose the model with the correct flow range based on total zone flow. Then select the correct pressure rating based on the following: 1. If you used Table 2: Maximum Length of a Single Techline HCVXR and CV Lateral, match the PRV to the same pressure rating you used for your maximum lateral length calculation, OR 2. Simply use a 45 psi PRV. Because Techline HCVXR and CV are pressure compensating, there is no reason to intentionally reduce the pressure below 45 psi. NOTE NOTES: 1. If the PRV is remotely located from the supply header, remember to account for any friction loss that occurs through the piping to the supply header. 2. Refer to Pressure Regulator sizing chart on page. 3. Low Volume Control Zone kits speed installation and have all of the components needed for a low volume zone. Kits are sized for a specific flow range. PRESSURE REGULATOR VALVES FLOW RANGES Low Flow PRV Operates from 0.25 to 4.4 GPM High Flow PRV Operates from 4.5 to 17.6 GPM High Flow PRV Operates from 11 to 35 GPM 17

19 BASIC DESIGN STEPS (CONTINUED) 3/4 LOW FLOW PRESSURE REGULATOR 3/4 HIGH FLOW PRESSURE REGULATOR 1 1/2 PRESSURE REGULATOR TABLE 5: PRESSURE REGULATOR SIZING CHARTS EMITTER FLOW RATE (GPH) MINIMUM 0.25 GPM MAXIMUM 4.40 GPM MINIMUM 4.50 GPM MAXIMUM GPM MINIMUM GPM MAXIMUM GPM TECHLINE HCVXR MINIMUM AND MAXIMUM LENGTH TECHLINE HCVXR EMITTER SPACING (IN FEET) , ,600 1, , ,637 1, ,0 2,000 1, ,800 3,000 2,069 1,364 6,400 4,000 2,759 1,819 2,000 1, ,000 1,875 1, ,000 2,500 1,725 1,137 6,364 3,978 2,743 1,808 9,546 5,966 4,115 2,7,728 7,955 5,486 3,6 TECHLINE CV MINIMUM AND MAXIMUM LENGTH 3/4 LOW FLOW PRESSURE REGULATOR 3/4 HIGH FLOW PRESSURE REGULATOR 1 1/2 PRESSURE REGULATOR EMITTER FLOW RATE (GPH) MINIMUM 0.25 GPM MAXIMUM 4.40 GPM MINIMUM 4.50 GPM MAXIMUM GPM MINIMUM GPM MAXIMUM GPM TECHLINE CV EMITTER SPACING (IN FEET) , , ,000 1, , , ,046 1, ,000 2,497 1,737 1,3 6,000 3,745 2,606 1,7 8,000 4,993 3,474 2,285 2,500 1,561 1, ,750 2,341 1,629 1,071 5,000 3,1 2,172 1,428 7,955 4,965 3,454 2,272 11,932 7,447 5,1 3,407 15,910 9,930 6,908 4,543

20 BASIC DESIGN STEPS (CONTINUED) LOW VOLUME CONTROL ZONE KITS: These preassembled kits speed installation and have all of the components needed for a low volume zone. Kits are sized for a specific flow range LOW VOLUME CONTROL ZONE (LVCZ Kit) - LOW FLOW WITH DISC FILTER Netafim Series 80 1 Valve (LVET1GH2) Netafim Disc Filter (DF075-0) Netafim PRV (PRV075LF42V2K) For zones ranging from GPM Low Flow Kit with 1" Control Valve (1" FPT Inlet x 3/4" FPT Outlet) (LVCZS LF) Low Flow Kit with No Control Valve (3/4" MPT Inlet x 3/4" FPT Outlet) (LVCZNV10075-LF) LOW VOLUME CONTROL ZONE (LVCZ Kit) - HIGH FLOW WITH DISC FILTER Netafim Series 80 1 Valve (LVET1GH2) Netafim Disc Filter (DF075-0) Netafim PRV (PRV075HF57V2K) For zones ranging from GPM High Flow Kit with 1" Control Valve (1" FPT Inlet x 3/4" FPT Outlet) (LVCZ10075-HFHP) High Flow Kit with No Control Valve (3/4" MPT Inlet x 3/4" FPT Outlet) (LVCZNV10075-HFHP) LOW VOLUME CONTROL ZONE (LVCZ Kit) - HIGH FLOW 1 ½" WITH DISC FILTER Netafim Series 80 1 ½ Valve (LVET1.5GH2) Netafim Disc Filter (DF150-0) Netafim PRV (PRV075HF57V2K) For zones ranging from GPM High Flow Kit with 1 ½ Control Valve (1 ½ FPT Inlet x 1 ½ MPT Outlet) (LVCZ-150HP) High Flow Kit with No Control Valve (1 ½ MPT Inlet x 1 1/2 MPT Outlet) (LVCZ-150HP-NV) 19

21 BASIC DESIGN STEPS (CONTINUED) LOW VOLUME CONTROL ZONE (LVCZ Kit) - LOW FLOW WITH SCREEN FILTER Netafim Series 80 1 Valve (LVET1GH2) Netafim Screen Filter (SF ) Netafim PRV (PRV075LF42V2K) For zones ranging from GPM Low Flow Kit with 1 Control Valve (1 FPT Inlet X 3/4 FPT Outlet) (LVCZS80SF10075-LF) Low Flow Kit with No Control Valve (3/4 MPT Inlet x 3/4 FPT Outlet) (LVCZNVSF10075-LF) LOW VOLUME CONTROL ZONE (LVCZ Kit) - HIGH FLOW WITH SCREEN FILTER Netafim Series 80 1 Valve (LVET1GH2) Netafim Screen Filter (SF ) Netafim PRV (PRV075HF57V2K) For zones ranging from GPM High Flow Kit with 1 Control Valve (1 FPT Inlet x 3/4 MPT Outlet) (LVCZSF10075-HFHP) High Flow Kit with No Control Valve (3/4 MPT Inlet x 3/4 MPT Outlet) (LVCZNVSF10075-HFHP) LOW VOLUME CONTROL ZONE (LVCZ Kit) - HIGH FLOW 1 ½" WITH SCREEN FILTER Netafim Series 80 1 ½ Valve (LVET1.5GH2) Netafim Screen Filter (SF ) Netafim PRV (PRV075HF57V2K) For zones ranging from GPM High Flow Kit with 1 1/2 Control Valve (1 ½ FPT Inlet x 1 ½ MPT Outlet) (LVCZSF-150HP) High Flow Kit with No Control Valve (1 ½ MPT Inlet x 1 ½ MPT Outlet) (LVCZSF-150HP-NV)

22 BASIC DESIGN STEPS (CONTINUED) SLOPES AND BERMS: Techline HCVXR and CV emitters have a built-in check valve. This allows Techline HCVXR to hold back up to a 8.5 and Techline CV up to 4.6 column of water. As such, designing Techline HCVXR and CV on slopes and berms is very easy. Techline HCVXR and CV should be installed perpendicular to (across) slopes. 2/3 Taller Slope Irrigation Method " at Top Up To +25% In the upper 2/3 of the slope, space Techline HCVXR and CV per Table 1, page 6. In the lower 1/3 of the slope, increase the distance between rows by 25%. 1/3 1/2" at Bottom For every 4.6 feet of elevation change, when using Techline CV either: - Split the slope into separate zones, or - Install a Netafim in-line check valve (TLCV050M1). For every 8.5 feet of elevation change, when using Techline HCVXR either: - Split the slope into separate zones, or - Install a Netafim in-line check valve (TLCV050M1). IN-LINE CHECK VALVE (TLCV050M1): Designed to hold back up to a 13.4 column of water Rule of Thumb: Every 1 of water exerts psi of pressure at the base of the column. As such, a 100 column of water exerts 43.3 psi at the base. Specifications: Flow Range: GPM ( GPH) Closing Pressure: 5.8 psi Opening Pressure: 10.2 psi Can hold back a 13.4 column of water ( ) Connection: 1/2" MPT In-Line Check Valve 1/2" MPT TLCV050M1-B 21

23 BASIC DESIGN STEPS (CONTINUED) TREES: It is important to provide trees with adequate water at the rootball, while also planning for the tree s needs as it grows. NOTE: When trees are transplanted, the soil in the rootball and the native soil are different. You must ensure that there are sufficient emitters irrigating both soils because water will not migrate from one soil type to the other. A loop of Techline close to the rootball, with more Techline surrounding the estimated dripline of the tree when mature will provide sufficient water. PVC or Poly Supply Header (continues to next tree) Netafim LVCZ Kit contains Pre-Assembled Valve, Filter and Pressure Regulator Techline Tubing and Components for Tree Planting Techline Tubing Staples Techline 17mm Insert Tee Techline 17mm Insert Cross Manual Flush Valve with Gravel Sump NOTE PRESSURE AND FLOW CHECKS: One of the best means of ensuring a Techline zone is operating properly is to test the pressure at regular intervals. By measuring and recording the pressure while the zone is running, you can ensure that the zone is working as installed. Take the reading as far away from the source as possible to ensure that pressures throughout the rest of the zone are at least that high. If readings are lower than normal, a line break, clogged filter, dirty valve, clogged PRV, or reduced line pressure are possible causes. NOTE: Always take the readings at the same time of day, from the same spot. This reduces the chance of faulty readings due to other factors. If a water meter is available, check the flow of each zone. Record the information at least once per year on a System Inspection Checklist (an example is provided on page 40). CALCULATING PRECIPITATION RATES: Method 1: See the Techline HCVXR and CV Application Rate Tables on pages 33 and 34. Method 2: If there is some variation in your design, (for instance, when we had to decrease the distance between the rows in our earlier example) then use Formula 1.2 on page 30. CAUTION: Though the precipitation rates of rotors, fixed sprays and Techline can be very close in many situations, we do not recommend tying dripline into spray or rotor zones. Techline HCVXR and CV have an irrigation application rate efficiency greater than sprays or rotors. Even when calculations make it appear that the application rates are the same, a Techline zone will actually be delivering more water since none of it is evaporating or landing where it can t be used.

24 TECHLINE HCVXR AND CV IN TURF TECHLINE HCVXR AND CV IN TURFGRASS: Background: Netafim products have been used successfully in turfgrass since the 1980's. It is a popular choice for a variety of residential and commercial general-use and specialized-use turf areas, and has been used very successfully in sports turf, as well as composition and grass tennis courts. WHERE AND WHY TO USE TECHLINE IN TURF: Long, odd-shaped or narrow areas: Allows greater landscape design freedom to use curvilinear layouts that cannot be utilized when overhead irrigation is used Eliminates wet roads and sidewalks Helps save water Reduces slipping and tripping hazards Reduces wet surface hazards to vehicle traffic The ability to irrigate areas with less water in long narrow areas where either getting the water is hard, or zoning the area is difficult Overspray is eliminated Areas close to buildings and at-grade windows: Stops windows from getting wet Allows the use of turfgrass close to a building without damage to facades Reduces deterioration and discoloration of building facades Athletic fields: No exposed sprinklers reduces impact injuries On tight-soil fields: Can be irrigated and softened prior to play without wetting the surface Helps reduce impact injuries from hard soil surfaces Because water window issues are eliminated, time of play increases Auto dealerships and other parking areas: No overspray reduces the cost of auto detailing Reduces slipping and tripping hazards Reduces wet surface hazards to vehicle traffic High wind, or constant wind areas: Overspray and wasted water is eliminated Water gets where it is supposed to be regardless of wind High liability areas: Tripping and other liability issues are significantly reduced Maintenance costs to repair broken sprinkler heads are greatly reduced Vandal-prone areas: Out of sight, out of mind Maintenance costs and potential liability of unrepaired problems is greatly reduced 23

25 TECHLINE HCVXR AND CV IN TURF Wood hardscapes: Bleaching of hardscapes such as wooden fences is eliminated Aesthetics of the wood hardscapes is maintained Steep slopes: Allows turf to be used on slopes Water is easily managed on slopes with dripline Wash outs are eliminated Locales where the cost of water is too expensive for overhead irrigation Unlike spray or rotor irrigation, which does not have an even application rate across its pattern, Techline HCVXR and CV have an extremely well-balanced application rate in the entire area. As such, you do not need to overwater to make sure the driest area receives enough water. Techline HCVXR and CV use about half of the water of an overhead system Techline HCVXR and CV are about 90% efficient vs. overhead irrigation, which is about 60% efficient Water window issues: Irrigate whenever necessary because there is no exposed spray Recycled/reclaimed water or fertigation applications where spraying water is illegal: Allows for use of nutrient-rich water, often at a greatly reduced cost Saves potable water supplies TIPS FOR USING TECHLINE HCVXR AND CV IN A NEWLY-SODDED LAWN: Use Table 1: General Guidelines recommendations for turf, see page 6. Bury the Techline approximately 4 below final grade In areas where mechanical aeration will be used, bury the Techline 6 below final grade and ensure aeration does not exceed 4" When installing the sod: It is important the final grade is smooth, ensuring that the sod makes solid contact with the soil Properly 'knit' the edges together Thoroughly wet the sod with overhead irrigation Roll the sod to ensure good contact If the irrigation system is automatic: Set the zone to run several times daily Keep wetted from above as necessary until the roots establish Once you cannot pull the edges of the sod up, discontinue overhead watering Irrigate on a daily or every-other-day basis Techline HCVXR and CV have a patented emitter design with a built-in physical root barrier in each emitter Techline HCVXR offers additional root intrusion protection with Cupron copper oxide which is embedded in the emitter resin during the manufacturing process. It will not wash off, wear off or leach out of the emitter for long lasting root intrusion protection throughout the life of the dripline.

26 SPECIAL APPLICATIONS AND TIPS PARKING LOT ISLANDS: If islands are small, consider tying several of them together on the same zone. Once you have determined that the conditions of the islands are similar enough to interconnect them, design each for the same precipitation rate by using the same Techline HCVXR and CV and spacing. Use one Low Volume Control Zone kit at the source, and install a manual flush valve (TLSOV) or figure 8 line end (TLFIG8) either at the end of the last island or, if the islands dead-end, on each island. Connections between the islands should be PVC, or as called out by the designer or local codes. ELECTRICAL GROUNDING: The effectiveness of electrical grounding is dependent on the soil and its moisture content. In moist soil, grounding is more effective than in dry soil. One method of ensuring moist soil is to install a length of Techline HCVXR and CV along a length of unclad copper wire being used for grounding purposes. The Techline HCVXR and CV are installed in the usual method. Run it from a separate station on the controller to give you maximum control. Techline HCVXR and CV can also be installed over the top of a grounding plate or ground rod. NOTE ABOVE AND BELOW GRADE: Techline HCVXR and CV are designed to be used in a variety of ways: It can be laid on the surface and held in place with Techline staples (TLS6), It can be buried below grade. NOTE: When using Techline HCVXR and CV above grade with staples, use enough staples to firmly hold the tubing in place, especially in freezing climates. 25

27 TECHLINE HCVXR AND CV WINTERIZING INSTRUCTIONS WINTERIZING INSTRUCTIONS: Winterizing an irrigation system involves removing enough water to ensure that components do not crack or break during freezing weather. Because Techline HCVXR and CV are designed to keep water sealed inside the tubing between irrigations, it is important that these simple steps be followed. MANUAL WINTERIZATION (no compressed air blow-out) A drain port must be present at all low points in the zone. Ports may be a tee or elbow with a threaded plug, a Netafim figure 8 line end (TLFIG8) or manual flush valve (TLSOV) which, when opened, will allow water to drain. If a Netafim automatic flush valve has been used, disassemble it. If the Techline zone is a grid or closed system, the supply and exhaust headers may contain a significant amount of water because they are either blank Techline tubing, PVC, or poly pipe. It is important to provide drain ports for these components. If the Techline laterals dead-end, and are not connected to an exhaust header, the lateral ends should be opened to drain at the lowest point(s). In the event that some water remains in the system, the disc filter should be disassembled, and the discs removed to allow any water to exit. Leave the filter disassembled in the event that some water remains in the system. In systems where elevation is a concern, install a drain port upstream of the filter to ensure as much water as possible is drained. Follow manufacturer instructions for any automatic zone valves. NOTE COMPRESSED AIR WINTERIZATION Follow the same initial procedures for a Techline HCVXR and CV zone as you would for a zone of overhead sprinklers. Note: Techline HCVXR and CV fittings are rated to 58 psi, so the air pressure must be adjusted according. It is air volume, not pressure that is effective when winterizing in this manner. The pressure regulator, which is normally installed in the valve box along with the zone valve and filter regulates water, not air pressure. Air pressure should be regulated to 58 psi or less. The drain ports, (a fitting with a threaded plug, a Netafim TLSOV, TLFIG8, or automatic flush valve), which are normally installed as far away from the water source of the zone as possible, must be open. Unscrew and disassemble any automatic flush valves. With all drain ports open, compressed air should be applied until no water is seen exiting the zone. 26

28 TECHNICAL DATA TECHLINE HCVXR DRIPLINE APPLICATIONS: Subsurface or on-surface installations Slopes Curved, angular or narrow areas High traffic/high liability areas Areas subject to vandalism Turf, shrubs, trees, flowers At-grade windows Sports turf, tennis courts, golf courses Green walls, green roofs Raised planters SPECIFICATIONS: Emitter flows: 0.33,, 0.77, 1. GPH Emitter spacings:,, ( spacing available on 1,000 coils only) Pressure compensation range: 21.8 to 58 psi High Check Valve: holds back 8.5 of water Bending radius: 7 Maximum recommended system pressure: 58 psi Minimum pressure required: 21.8 psi Tubing diameter: 0.66 OD; 0.56 ID, wall Coil lengths: 100, 250, 500, 1,000 Recommended minimum filtration: 0 mesh Diaphragm: molded silicon ISO 9261 Standard Compliance TECHLINE HCVXR QUALIFIES FOR USE ON LEED PROJECTS FEATURES/BENEFITS: LONG LASTING PROTECTION THROUGHOUT THE LIFE OF THE DRIPLINE Cupron copper oxide will not wash off, wear off and does not leach out of the emitter providing superior root intrusion resistance. HIGH CHECK VALVE IN EACH EMITTER The high check valve is great on slopes because it holds back 8.5 of water (elevation change) keeping the dripline charged for even distribution of water with no low emitter drainage. NEW COLOR FOR EASY IDENTIFICATION The dripline has a new color for easy identification as Techline HCVXR. FOUR NEW EMITTER FLOW RATES Achieve maximum design flexibility with four new emitter flow rates - the most options offered in the industry. Techline HCVXR dripline also has the same superior features and benefits as Techline CV which include: Physical Root Barrier - the offset flow path, extra large bath area and raised outlet provide additional root intrusion protection Anti-Siphon Feature - prevents debris from entering the emitter outlet at system shut-down. Surface and subsurface installations don t require air relief valves Pressure Compensating - delivers precise, equal amounts of water over a broad pressure range Continuous Self-flushing Emitter - flushes debris as it s detected Laser Etching - permanent identification for model and flow rate right on the dripline One-Piece Dripline Construction - reliable, easy installation Flexible UV Resistant Tubing - bending radius of 7 adapts to any planting area shape 27

29 TECHNICAL DATA TECHLINE CV DRIPLINE APPLICATIONS: Subsurface or on-surface installations Slopes Curved, angular or narrow areas High traffic/high liability areas Areas subject to vandalism High wind areas Turf, shrubs, trees, flowers At-grade windows Sports turf, tennis courts, golf courses Longer lateral runs Green walls, green roofs Raised planters SPECIFICATIONS: Emitter flow rates (GPH): 0.26, 0.4, 0.6, 0.9 Emitter spacings:, ", ", " (" is available in 0.6 & 0.9 GPH flow rates only) Pressure compensation range:.5 to 58 psi Maximum system pressure: 58 psi Tubing diameter: I.D. x 0.660" O.D., 0.050" Wall Coil lengths: 100', 250', 500', 1,000' Recommended minimum filtration: 0 mesh Diaphragm made of silicon ISO 9261 Standard Compliance QUALIFIES FOR USE ON LEED PROJECTS FEATURES/BENEFITS: 2 psi check valve in each emitter: All emitters turn on and off at the same time, maximizing balance of application. Holds back up to 4.6 of water (elevation change). No low emitter drainage, great on slopes. Delivers more precise watering. Unique patented emitter design with physical root barrier: Offset flow path, extra large bath area and raised outlet prevent root intrusion without chemical reliance. Pressure compensating: Precise and equal amounts of water are delivered over a broad pressure range. Continuous self-flushing emitter design: Flushes debris as it is detected, throughout operation, not just at the beginning or end of a cycle, ensuring uninterrupted emitter operation. Emitter with anti-siphon feature: Prevents ingestion of debris into tubing caused by vacuum. Self-contained, one-piece dripline construction: Assures reliable, easy installation. Flexible UV resistant tubing: Adapts to any planting area shape - tubing curves at a 7 radius. For on-surface installations withstands heat and direct sun. Makes installation quicker: Does not require air/vacuum relief vent or automatic flush valve for on-surface or subsurface installations. Use manual flush valves at exhaust headers. 28

30 TECHNICAL DATA Above View TECHLINE CV EMITTER Below View Raised lip surrounding the exit hole, along with the air gap between the exit hole in the emitter and the tubing, provides physical root barrier. Labyrinth Emitter Cover Emitter Cover Diaphragm Diaphragm Labyrinth Filtration Surface TECHLINE HCVXR EMITTER Cupron copper oxide (Cu 2 O) technology effectively deters roots from growing in the HCVXR emitter. During the manufacturing process, the copper oxide is mixed with the emitter resin material infusing the copper oxide in the emitter. It will not wash off, wear off or leach out of the emitter. The copper colored top portion of the emitter contains the embedded copper oxide. Top with embedded copper oxide Diaphragm Bottom with large filtration area 29

31 DESIGN FORMULAS FORMULA 1.1 Estimated Total Length of Dripline = Irrigated Area x Minimum Recommended Lateral Spacing (inches) In Which: Estimated Total Length of Dripline = Total Footage of Dripline in a Zone Irrigated Area = Total Area in Square Feet Minimum Recommended Lateral (Row) Spacing = The minimum row spacing from the General Guidelines Chart in inches FORMULA 1.2 Application Rate = x Emitter Flow Rate (GPH) Dripline Row Spacing (inches) x Emitter Spacing (inches) In Which: Application Rate is = Inches per Hour of Water Being Applied Emitter Flow Rate = Gallons per Hour Flow of One Emitter Emitter Spacing = Spacing in Inches of Emitters Inside Tubing Dripline Row Spacing = Inches Between Techline Laterals (rows) Note: 0.4, 0.6, and 0.9 GPH are nominal flow rates. Actual flow rates of 0.42, 0.61, and 0.92 GPH should be used in the calculations. FORMULA 1.3 Number of Emitters in a Zone = Total Dripline x Emitter Spacing (inches) Number of Emitters = Number of Emitters Total Dripline = Length of All Dripline in a Zone in Feet Emitter Spacing = Spacing in Inches of Emitters Inside Tubing FORMULA 1.4 Flow Per Zone = Number of Emitters x Emitter Flow Rate (GPH) 60 In Which: Flow Per Zone = Total Gallons per Minute Number of Emitters = Number of Emitters Emitter Flow Rate = Gallons per Hour of One Emitter 30

32 DESIGN FORMULAS (CONTINUED) FORMULA 1.5 Estimated Total Zone Flow = Irrigated Area x 4 ( Emitter Spacing (inches) x Dripline Row Spacing (inches) ) x Emitter Flow Rate (GPH) 60 In Which: Estimated Total Zone Flow = Gallons per Minute in Zone Irrigated Area = Total Area in Square Feet Emitter Spacing = Spacing in Inches of Emitters Inside Tubing Dripline Row Spacing = Inches Between Techline Laterals (rows) Emitter Flow Rate = Gallons per Hour of One Emitter FORMULA 1.6 Estimated Run Time = Daily Et (inches) Application Rate (inches per hour) x 60 (minutes) In Which: Estimated Run Time = Estimated Number of minutes of run time for a particular zone (based upon input data) Et = Evapotranspiration; The amount of water released from soil by evaporation and transpiration from plants. Daily Et = Monthly Et divided by the number of days in the associated month. Application Rate = Inches per hour of water being applied. This can be calculated by using Formula 1.2, or by referencing the Application Rate Charts on pages 33 and minutes = Conversion factor from hours to minutes (60 minutes in one hour). Note: Evapotranspiration rates for your geographic location can be found by searching the internet for local weather stations, from weather data services, from on-site weather collection devices, or from Historical Et data. If you are not irrigating daily, the Daily Et should be multiplied by the number of days since your prior irrigation cycle in order to replace the total Et since your previous irrigation cycle. If the Estimated Run Time is long enough to create water run-off, the total run time should be broken into multiple irrigation cycles. Cycle run time should not generate water run-off. 31